Lock



Feb. 16 1926.

M. ANUNDI LOCK Filed August 9, 1924 Improvement in Locks, of which Patented Feb. 16, 1926.

UNITED STATES 1.513. PATENT OFFICE.

MATT ANUNDI, or oLA'rsKA IE, OREGON.

LOCK.

Application filed August 9, 1924. Serial No. 731,075.

To all whom itmay concern: 7 V Be it known'that I, MATT ANUNDI, a c1t1- zen of theUnited Statesrand a resident'of Glatskanie, county ofColumbia, State of,

thereof will be transmitted to the sliding bolt to force the latter back against a spring, and thus disengage the bolt from its keeper.

The object of myinvention is to provide a lock of this character which is simple in operation, is inexpensive to manufacture and difficult toopen except with knowledge of the correct operation thereof, and the use of the proper key, and I preferably pro vide an alarm which signals each at-temp to open the lock. e

A further and incidental object of my invention is to provide a novel latch for hold- ,ing the swinging tumbler out of operable position when the 'keyis rotated jini,the

wrong direction and which, by preventing the return ,of said tumbler to its normal operative position, prevents the door from being opened until suchlatching means is released.

A further object is to provide an alarm with this type oflock which consists preferably of two spirally coiled pieces of resilient' wire, one ateach side of the keyhole, these coiled wire alarms being arranged so that the key mustengage either before it can move'into engaging position with the lock. operating mechanism. As the key moves past eitherof the spirally wound alarms it engages the free end thereof for a short period of time and when it releases the same by passing beyond the alarm the resiliency of the spring produces a ring when it springs back to its normal position.

The, details of construction and mode of operation of my device are hereinafter more fully described with reference to the accompanying drawings. H

' In the drawings: 4

Fig. l is a longitudinal section through the lock and illustrates that the blade of the key when inserted in the key hole must actuate either ofthe alarms in order to pass to operating position withthe lock operat ing mechanism, this'sectionis taken on the 'line11 of Fig. 2; y, "-HFi 2 's a transverse section taken ap-v proznmatelyon the line 2-2 of Fig. 1 and shows the key with a portionbroken away to illustrate a detail of. construction;

Fig. 3 is an elevation of my improved lock with parts broken away to disclose the action of thelock on the swinging tumbler;

Fig. 4e is a similar view except thatfit I shows the key having been rotated after engagement with the swinging tumbler toga positionin which it has moved the sliding lock out of engagement with its keeper;

' Fig. .5 is a similar view to the preceding figures and illustrates how the swinging tumbler ls moved out of operative position and s held in that position when the key is rotated in the wrong direction; and 7 Figs. 6, 7 and 8 are Cl6l32L1lG(ll'Vle\YS 1llus tratlng structural features.

My l0ck is preferably made sov that it is wholly contained within a casing a having a removable cover a whichis held thereto by screws 6. The casing. isadaptedto be recessed within theside .walloofthe container and the lid d 'which the lock holds closed is provided with a fixed keeper 0 having outstanding ear's ef which pass through the 'aperturedfront piece a of the casing to engage similar ears f on the sliding lock bolt ft The bolt f is recessed at, one, side and engages therein a bar 1, arranged transverse of said casing. The space between said bar and said casing is such that a sliding fit is provided for said bolt.

The swinging tumbler g, is pivotally. connectedtothe pendent arrnf 0n the sliding bolt, being held upon a pin f. 'I. he swinging tumbler has a pin 9 extending outwardlytherefrom and a coiled spring his attached thereto which normally holds, the

swingingtumbler lnjthe posltion shown in Fig. '1, which is, substantially ahned with the arm butslightly at an angle thereto. The free. end of the, swinging tumbler is provided with'anotch g with-which the-bit of the key 71 is adapted to engage. a V The key is'ninsertedinto the lock through a key hole jandxat one side of the key hole is an'alarm la and at the other, an alarm I07,

wh-ich consist ofspirally' wound-coils of re- 7 sili'ent. wire.

7 The-extremities- I0 and-7c respectively of the 0011s is and 7c are arranged tolie in the path'of 'the bit 2' of the key' and thus to be engaged therewith during portion of its rotation. hen the bit moves by the extremities, it realeses them and the resiliency of the wire, springs the coil back to normal position and results in a pro nounced ring which thus acts as a signal to indicate that someone is attempting to open the lock.

The key 2' is preferably provided with a hollow barrel 7? which is adapted to fit over the guiding pin Z which is carried by a re silient spring-like member m. ihe depth of this hollow barrel is less than the length of the pin Z, for the purpose hereinafter describec The spring like member m is fastened at one end, as m, to one side of the cas ng a and its other end we is provid d w th a latching lug m which extends through the wall of the casing and is adapted to engage the swinging tumbler in one position, as shown in Fig. 5. When thetumbler is en gaged by the latching lug, the lug can be moved out of engagement therewith only by pressing upon the key and forcing the spring like member m outwardly, away from the wall of the casing. This is permitted because of the difference in length in the depth of the barrel and length of the pin, hereinbefore referred to and clearly shown in Fig. 2. The member m normally lies flat, as shown in this figure, and is of relatively substantial strength. Thus, when the key is inserted in the lock and the bore of the barrel of the key fits over the pin Z, the member normally acts as a stop. To release the key it is necessary to use more pressure than would normally be. used to open the lock and thus the latch would not be inadvertently released by the uninformed. The flexure of the member on under the pressure of the key 2' is limited by the striking of the end of the key against the casing which separates them. This prevents the elastic limit of said member from being exceeded which would resuit in permanent bending of said member and the improper engagement of the latching lug m The bolt f is normally held in co-operative relationship with the keeper 6 by a leaf spring a and to open the lock it is necessary that the bolt must be moved so as to flex the springs before it can be moved out of engagement with its keeper.

The operation of my lock is as follows:

The key 2' is placed in the key hole 7' as shown in Fig. 1 and should be moved in a counter clockwise direction to the position shown in Fig. 8. In this position it has moved the swinging tumbler upwardly until the blade 2' engages the notch g in the tumbler and then by reversing the direction of the rotation of the key, that is in a clockwise direction, the bolt will be moved towards the right as viewed in Figs. 1, 3, 4

and 5 so as to be out of engagement with its keeper, as shown in Fig. 4. The angle that the swinging tumbler 9 makes with the arm f in this position prevents the tumbler from rotating about its pivot and thus sustains the thrust of the blade of the key in sucha manner that it moves the bolt against the action of the spring a.

If, however, it is attempted to open the lock by inserting the key in the key hole and moving it directly in a clockwise direction the blade will merely move the swinging tumbler into the position shown in Fig. 5, where it will be held by the latch m and will permit the blade of the key to con tinue its rotation without effecting the disengagement of the sliding lock band with its keeper. The key can then be rotated in either direction without affecting the lookingmechanism.

Each rotation of the key blade, however, will engage and disengage the ends Z0 and 783 of the coil springs, thus signalling that attempts are being made to open the lock. hen the latch m has engaged the swinging tumbler it is necessary to press downwardly on the key as hereinbefore described to permit'the swinging tumbler r to be returned to its normal position by the spring h.

I claim:

1. In a lock of the character described, a spring controlled slidable bolt adapted to engage. a keeper, a tumbler pivotally attached to said bolt, resilient means for holding said tumbler in one position, a resilient latch adapted to engage and hold said tumbler when rotated in one direction, means for releasing said latch, and a guide for the key adapted for opening said lock, said guide and said latch being mounted upon a common yielding device,- whereby pressure applied to said key serves to release said latcln 2. In a lock of the character described, a spring controlled slidable bolt adapted to engage a keeper, a tumbler pivotally attached to said bolt, resilient means for hold ing said tumbler in one position, a resilient latch provided with a lug adapted to engage and hold said tumbler when rotated in one direction, said latch provided with a pin, and a key provided with a barrel whose bore is shorter than said pin, whereby the key when pressed against said pin will move the latch to withdraw the same from engagement with said tumbler and means for timiting the movement of said latch by said rev.

3. In a key operated look, a casing, a bolt holding said tumbler in one position, (said key when turned in a direction opposite to tumbler having means onv its free end the one to open said lock, said guide and adapted to be engaged by the bit of a key latch being connected by a common yield- 10 used for opening said look when said'key is ing member whereby the yielding of the 5 turned in one direction, and a latch adapted guide serves to release said latch.

to engage said tumbler and hold the same out of the path described by the bit of the MATT ANUNDI. 

